[SandroMaglione]

Fixes the breaking problems #187 listed as known. Each was reproduced on copies of the real games' art first, then checked again after the fix.

What changes

• Saving no longer stops after art is renamed. When the agent renamed a file, or pixel fix put X.fixed.png in place of X.png, every later save failed with no such asset until a reload, which lost what was unsaved. Now the server writes the assets it finds and says back the rest. A review of a name no longer found stays in pixel.review.json under that name, and pixel notes lists it under gone.
• A review can't be overwritten by a page that missed an asset coming back. The review's version now follows which assets are found, so that page gets a 409 and merges. Found while fixing the above: the old code would have deleted that review.
• A comment being typed is kept. It survives a click on a status and a reply from the agent, with focus and caret in place. Moving to another asset, animation, or view adds it, with a message saying so. Cancel and Esc drop it, and drawing a new area keeps the text.
• pixel notes no longer misleads. An approved asset with open comments no longer says "Leave it as it is". An asset with a note or comments but no status comes ahead of untouched ones, and the summary counts it apart.
• A large folder no longer blocks the page. Reads take turns, so the server answers between them, and the page shows "Reading the art… 239 of 2128". Once all is read, the list comes however long its files take to check, so the page can't stay on "2128 of 2128". Past 500 assets, pixel review prints a warning and pixel notes warns on stderr before it starts reading.
• Holding an arrow key works in Safari. It hit Safari's limit of 100 address changes in 10 seconds. The address now updates once the person stops on an asset.

Decisions to check

• Moving on adds the comment rather than asking or dropping it, because everything else on the page saves as the person goes. Undo takes it back. The risk is a half-written thought reaching the agent, so the page says it was added.
• A picture is now served as its file, not decoded and written again. The hash still comes from the decoded pixels. A browser could draw a PNG with a color profile differently from the pixels hashed, which is also how the game's browser would draw it. Re-encoding on demand was tried first: on the whole set, the page's saves waited behind picture requests for a connection, and the page stuck on "Saving…" for over 8 seconds in WebKit.
• 500 assets is the warning line. The real folders are 85 to 144 assets of art, and spirit-call/art is 2128, mostly 3D renders. It warns and carries on: a large folder may be what the agent meant.

Measured on spirit-call/art (2128 PNGs)

	Before	After
Page answers while reading	no answer for 5 minutes	within 1 second
List ready	305 s	225 s
pixel notes	314 s	217 s
Server memory	about 2.8 GB	about 750 MB

Before and after were single runs, so take the times as rough. The "after" runs had other tests going beside them.

Verification

• pnpm run check (1401 tests) and pnpm pack:check pass. website/ isn't touched.
• New tests in test/pixel-review.test.ts cover saving after a rename, a stale page and an asset coming back, the list answering while it reads, next with open comments, and the order and summary.
• The page's behavior has no repo test, since the repo has no browser test setup. A throwaway Playwright run covered it in Chromium and WebKit, on the built page, over copies of Still Time, Warden, Spirit Call, Dungeon Paint, Pixel Probe, and Style Probe (238 assets):
  • 88 checks on these fixes: typed text through a status click, a resolve, an asset, view, and animation switch; Esc and Cancel; undo; a rename, a rename back, and typing on an asset as it goes away; pixel fix; 150 presses of ↓; the notes.
  • The layout and review checks from ritmo-tools pixel: review a game's pixel art on one page, and read back what the person said #187 again: 84 in dark and light, 72 more on the grid and zoom, and 47 per browser on the review flow.
• The page was watched in both browsers on all 2128 assets, with the count going up and the list arriving with no errors.
• The real game folders weren't changed.

Not covered

• source in the notes. It still only shows when the source sits beside the PNG, so Still Time's notes don't name theirs. Nothing breaks without it, and fixing it needs a decision on how a game declares where its sources are.
• A comment typed when the page reloads or closes is still lost.
• The effects page's comment box is built the same way as the one fixed here, so it may lose typed text too. Not tested.
• WebKit at exactly 1×: a press can land one pixel off. Assets now open larger, so this is rarer, and it's unchanged here.

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